The Progressive Era marked a turning point in American business regulation. As large corporations and trusts dominated the economy, public concern grew over monopolistic practices and lack of competition. This period saw the passage of landmark legislation like the Sherman Antitrust Act and the creation of regulatory agencies to curb corporate excesses. Key figures like Theodore Roosevelt and Woodrow Wilson championed reforms to balance business interests with public welfare. Muckraking journalists exposed industry abuses, leading to food safety laws and labor protections. While these efforts didn't fundamentally alter corporate dominance, they established important precedents for federal oversight of business practices.